Electric hot-water heating system.



W. L. WATERS.

ELECTRIC HOT WATER HEATING SYSTEM.

APPLICATION FILED JAN-22,1913- Patented June 29, 1915.

2 SHEETSSHEET l.

. in wami frv @Cwm w. L. WATERS.

ELECTRIC HOT WATER HEATING SYSTEM.

APPLICATION FILED JAN..22, 1913.

1, 144,954. Patented June 29; 1915.

2 SHEETS-SHEET 2.

" UNITED A'IPES- PATENT OFFICE.-

WIIiLIAM I1. WATER-S, OF MILWAUKEE, WISCONSIN.

nnncrnre HOT-WATER. HEATING SYSTEM.

To gill when? concern:

'Be'it known that I, Wnmmm L. WATERS, a citizen of'the United States, residing at Milwaukee, in the-county of Milwaukee and State of Wiscon si'n, have invented certain new and useful I Improvements in Electric Hot-Water Heating Systems, of which'the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of a this specification.

' My invention relates to electric hot water heating. systems and its object is to utilize the waste heat f roman electric stove, oven, range or furnace to heat a supply of water which is subsequently delivered to the water supply tank of a'hot water heating system.

. tions or In order. to accomplish the above'object, I provide the stove, oven, range or furnace with a heat insulating-wall, which wall is surrounded by a jacket of water whose tem- Around this water jacket I preferably provide a wall of heat insulating material to prevent loss of heat by radiation from the hot water jacket. The provision of this last mentioned wall is however, to be considered optional as the same may be dispensed with if desired. The hot water jacket is provided with suitable connections whereby it may be replenished with water as desired. In connection with the water jacketed stove or oven I provide a suitably insulated water supply tank, from which the water supply for a hot water distributing systemis sup plied. The lower end of; the water jacket preferably has commun cation with the lower end of the water supply tank. Communication is also provide between the upper end of the water jacket and a polnt 1n the tank located above the point'where the first-mentioned connection is made. By so connecting the water jacket with the hot water supply tank, I secure a-circulation of water through the two passages leading from the water j'acket' to the tank. The

i Specification Letters Patent I Patented June 29, 1915. fA pplication'filed January 22, 1913. Serial No. 743,514.

stove or oven is provided with an electric heating element of any suitable type. As

the temperature of the water jacket with which the stove or oven is provided is raised, due to the waste heat from the stove or oven, warm water passes fro the water jacket into the water supply ta The hot water tank is provided with an electric heating device for raising the preheated water within the tank to any desired temperature. The connections between the electric-heating device of the stove or oven and the electric heater with WhlCl: the hot water supply tank is provided may if desired be such that the demand for electrical energy will not at any time exceed a predetermined maximum.

desirable circuit arrangement is one in which a certain amount of electrical energy is supplied to the stove and heater continuously; there being a certain additional amount of energy which may be switched from one to the other, as desired. These and other features of the electric hot water heating system 'of my invention are set forth in the following description and are illustrated diagrammatically in the accompanying drawings, in which- Figure 1 shows the stove or oven and the water supply tank in vertical section. Fig.

2 illustrates the circuit connections for the electric heating devices; and Fig. 3 illustrates in vertical section a modified form of my invention.

Similar reference numerals refer to similar parts throughout the drawings.

In Fig. 1 of the drawings I have shown a stove or oven at 3, which stove or oven is provided with an electric heating device illustrated at 4. Surrounding the stove or oven 3 is a water jacket 5,which is separated from the stove or oven by suitable heat insulation'illustrated at 6. The purpose of the water jacket isto absorb and employ usefully, the wasteheat from the stove and to do this without interfering with the natural operations of the same; thus the wall 6 is necessary. Around the water jacket 5 is provided a layer of heat insulating material 7 which serves to prevent loss of heat by radiation from the water jacket. A pipe 8 provided with a suitable valve 9 affords communication between the water jacket 5 and a source of water supply. The heat insulating walls above mentioned may if desired, be made of magnesium carbonate, infusorial earth or other similar material. At

10 I have illustrated a hot water tank which i is provided with suitable heat insulation in-' wateris taken from the tank. This pipe 12' is provided with a suitable -valve .13, as shown. Aifording communication between the lower end of the water jacket and the device of such heat storage stove -is made to perform useful work. v

In .the modified form of my invention illustrated in Fig. 3, the stoveis indicated at 3 and is provided with an electric heater 4:. .Said stove in this modification is lo-' lower end of the hot water tank is a pipe/cated within the water tank, the water with- 14, which is provided with a valve 15, as shown. Entering the acket 5 at, the top thereof and entering the hot water tank 10 at a point above the point where the pipe 14 enters the same, is a pipe 16, provided with a valve 17, as shown. As illustrated, pipes 14 and 16 are preferably provided with lagging indicated at 14 and 16; It

will thus be seen that as the temperature of the water jacket 5 is raised, the heated water will be circulated through pipe 16 into the tank 10 and cooler water from the tank 10-circulates through pipe 1 1 into the water jacket. The valves 15 and 16 are provided merely for the purpose of shutting, off communication between the water jacket and water tank, if this should be desirable.

Screw-threaded into the bottom of the tank 10 is a casing-18, which supports an electric heating member 19. Theheating member 19 is provided in order that the water in the tank 10, which vhas been previously heated in the jacket 5, may be raised to any desired temperature. The conductors for the electric heating device enter the casing through the sealed aperture 20. The casing 18 is provided with a pipe 21 which extends upward almost to the top of the tank 1() The casing 18 is also provided with one or more holes illustrated at '22. It will thus be seen that when the heater 19 is in operation, a circulation of water will be maintained through the casing 18 and the pipe 21 supported thereby.

As illustrated in Fig. 2, the electric circuit connections for the heaters 4 and 19 are such that the relative amount of energy ex-, pended in these two heaters can be varied over wide limits with the restriction that the total energy consumed by the two units remains constant, keeping the energy. demand. within predetermined limits. In order to accomplish this operation, each of the heating units may be designed to'con-v in the tank surrounding the heat insulating water for a hot water heating system; time, all of the energy furnished to the heating wall 6? of the stove and so serving as a;-

' water j acket. The tank is provided. with an I individual heating element as in the tank illustrated in Fig. 1. The parts shown in Fig. 3 which conform to the parts illustrated in Fig. 1 are indicated by the same reference numerals with the addition of the letter a.

Although I have illustrated my invention in the particular embodiments herein shown and described, it is apparent to those skilled in the art-that a number of modifications of my invention may be made without departing' from the spirit of my invention.

Although in the following claims I refer to the element provided with the water jacket as a stove, I do not desire to be limited to a stove in a limited sense, but desire to claim broadly any equivalent applications of my invention to ranges, furnaces,

ovens, etc.

What I claim and desire to secure by Letters Patent of the United States is:

1. In combination, a stove comprising a heater and an envelop of a heat conducting liquid surrounding the stove, the temperature of said liquid being raised by means of the heat escaping from said stove and which would otherwise be wasted said liquid adapted to circulate freel and an electric heater separate from the rst heater immersed in the liquid constituting theenvelop, said last mentioned heater being arranged to further raise the temperature of the liquid as desired.

2. In combination, a stove comprising a heater and an envelop of heat conducting liquid surrounding the stove, the temperature of said liquid being raised by the heat escaping from said stove and which would otherwise be wasted and an electric heater separate from the first heater immersed inthe liquid constituting said envelop, said last -mentioned heater being arranged to further raise the temperature of the liquid as desired, and a la er of heat insulatin material interposed tween the stove an the liquid envelop to hinder the flowv of heat to said liquid and another layer of heat insulating material surrounding the liquid envelop to cut off substantially all heat losses.

3. In combination, astove comprising .a

heater an envelop of heat conducting liquid surrounding the stove, the temperature of said liquid being raised and said liquid caused to circulate by the heat escaping from said stove and which would otherwise be wasted and an electric heater separate from the first heater immersed in the liquid constituting the jacket, said last mentioned heater being arranged to further raise'the temperature of the liquid as de'sired, there being a layer of heatihsulating material surrounding the envelop of heat conducting liquids 4. In combination, a high temperature heater an envelop of heat conducting liquid surrounding said heater, the temperature of the liquid constituting the conducting envelop being raised by the escaping heat from the stove and which would otherwise be wasted, a layer of heat insulating material interposed between the liquid envelop and the heater to prevent transmission of heat to said liquid and another layer of heat in sulating material surrounding the liquid enve op.

5. In combination, a high temperature heater an envelop of heat conducting liquid l5 surrounding'the heater, the temperature of the liquid constituting the con ucting envelop being raised by the heat escaping fromthe heater and which would otherwise be wasted, said liquid being caused to circu- 80 late in said envelop, and a layer of heat msulating material surrounding the conducting envelop to cut ofl heat loses.

6. In combination a heater, an envelop of conducting liquid surroun the heater, as the tem ture of the liqui constituting the con ucting envelop being raised by the heat escaping from said heater and which heat would otherwise be Wasted, a hot liquid tank ha'vingdirect communication with said 40 envelop, said envelop and said tank being connected by pipes to give a circulation, a hot liquid distributing system supplied from saidtank and an electric heater -m said/tank arranged to raise further the Aemjierature of the liquid, previously warmed by the heat escaping from the heater. 4

7. In a hot water heating system, aheater, heat insulating material surrounding said heater to prevent the flow of heat from said heater and to allow the attainment of high temperature in said heater, a mobile conducting material surrounding said insulating material, said material automatically conducting only the heat that esca from said heater bypassing through sai heat insulating material to a point remote from said heater, a second heater for heating said mobile conducting material to a higher degree, said second heater being substantially inclosed by said conducting material.

8. In combmation, a high temperature heater having a layer of heat insulating material immediately surrounding said heater, an envelop of conducting fluid surrounding said heater and absorbing substantially all of the heat escaping from said heater, said conducting fluid being in free communication with a large body of said fluid whereby circulation of said fluid is free to occur and a second heater immersed in said fluid for heating the same to a higher degree In witness whereof, I hereunto subscribe any name this 18th day of January, A, D.,

a L. WATERS.

Witn: Joan M. Dav'ms,

JOHN J. McConmcx. 

